Check for unusual battery drain
Check for unexpected data usage spikes
Look for overheating when idle
Review installed apps for unknown or suspicious names
Check for apps with device admin access
Review accessibility services for unknown apps
Check for notification access permissions
Check for apps with SMS, call log, microphone, camera, or location permissions that seem unnecessary
Look for strange pop-ups or ads outside normal apps
Check for unfamiliar apps in the app drawer and settings
Review recent app installs and update history
Monitor for random reboots or performance slowdowns
Check for unusual background activity in battery and data settings
Scan the phone with a reputable mobile security app
Run Google Play Protect
Check for forwarding settings on calls and messages
Review browser extensions or unknown browser apps
Look for device management profiles or work profiles you did not set up
Check for root access or signs the phone has been modified
Boot into safe mode and see if suspicious behavior stops
Back up important data and perform a factory reset if spyware is suspected